设计模式之Builder模式

Builder模式的关键是其中的Director对象并不直接返回对象，而是通过一步步来一步步进行对象的创建。当然这里Director可以提供一个默认的返回对象的接口（即返回通用的复杂对象的创建，即不指定或者特定唯一指定BuilderProduct*中的参数）。

Product.h

#ifndef_PRODUCT_H_
#define_PRODUCT_H_
classCProduct
{
public:
	CProduct();
	~CProduct();
};
#endif

Produce.cpp

#include"Product.h"
CProduct::CProduct()
{

}

CProduct::~CProduct()
{

}

Builder.h

#ifndef__BUILDER_H_
#define__BUILDER_H_
#include"Product.h"
#include<string>
#include<iostream>
usingnamespacestd;
classCBuilder//AsaInterface
{
public:
	CBuilder();
	~CBuilder();
	virtualvoidBuilderProductA(conststringA)=0;
	virtualvoidBuilderProductB(conststringB)=0;
	virtualvoidBuilderProductC(conststringC)=0;
	virtualCProduct*GetProduct()=0;
};
#endif

Builder.cpp

#include"Builder.h"
CBuilder::CBuilder()
{

}

CBuilder::~CBuilder()
{

}

ConcreterBuilder.h

#ifndef__CONCERTERBUILDER_H_
#define__CONCERTERBUILDER_H_
#include"Product.h"
#include"Builder.h"
classCConcerterBuilder:publicCBuilder
{
public:
	CConcerterBuilder();
	~CConcerterBuilder();
	voidBuilderProductA(conststringA);
	voidBuilderProductB(conststringB);
	voidBuilderProductC(conststringC);
	CProduct*GetProduct();

};
#endif

ConcreterBuilder.cpp

#include"ConcreterBuilder.h"
CConcerterBuilder::CConcerterBuilder()
{

}

CConcerterBuilder::~CConcerterBuilder()
{

}

voidCConcerterBuilder::BuilderProductA(conststringA)
{
	cout<<A<<endl;

}
voidCConcerterBuilder::BuilderProductB(conststringB)
{
	cout<<B<<endl;

}
voidCConcerterBuilder::BuilderProductC(conststringC)
{
	cout<<C<<endl;
}

CProduct*CConcerterBuilder::GetProduct()
{
	returnnewCProduct;
}

Main.cpp

#include<iostream>
#include"Director.h"
#include"ConcreterBuilder.h"
usingnamespacestd;
intmain()
{
CDirector*pDir=newCDirector(newCConcerterBuilder());
pDir->Construct();
deletepDir;
return0;
}